Effect of surface morphology on atmospheric corrosion behaviour of Fe-based metallic glass, Fe67Co18Si14B1

Abstract

Abstract. The nature of atmospheric corrosion behaviour of an as-cast metallic glass, Fe 67 Co 18 Si 1 B 14 ribbon, was evaluated. The wheel side surface of the ribbon was more corroded than the air side surface, due to the higher density of air pockets present. The phases present in atmospheric rust were analysed by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) to be goethite, lepidocrocite, magnetite, cobalt oxide and cobalt hydroxide phases. Goethite and lepidocrocite were in amorphous form. The nature of rusting was understood by scanning electron microscopy (SEM). Nucleation of rust started at preferred locations on the surface and grew along the surface in certain directions.

Effect of Structural Morphology on the Electrochemical Behaviour of Ni78Si8B14 alloy in 1 M HNO3 Aqueous Medium

“…It is noteworthy here that the results of the present investigations are also corroborated by weight loss studies and optical micrographs. Similar investigations are reported by some investigators [7][8]. Dutta et al reported that the wheel side surface of the Ti-Cu ribbon possess inferior corrosion resistance as compared to the air side surface.…”

Corrosion and Oxidation Behavior of Ti-Based Amorphous and Nanocrystalline Alloys

“…The oxidation and corrosion behavior of several Zr-based alloys, both in ribbon as well as in bulk form, has earlier been investigated in the author's laboratory [11,12,52]. For a review of the oxidation and corrosion behavior of other important Zr-and Fe-based amorphous alloys reader may refer to reported articles in the literature [15,[68][69][70][71].…”